add day 1

...ction/1_welcome+login/01_Register_for_new_JSC-Account.mp4

day1_introduction/1_welcome+login/02_Join_a_JSC-project.mp4

..._introduction/1_welcome+login/03_Sign_Usage_Agreement.mp4

...roduction/1_welcome+login/04_Register_for_Jupyter-JSC.mp4

...tion/1_welcome+login/jupyter4hpc_welcome+introduction.pdf

day1_introduction/2_tour_ui/1-JupyterLab-interface.ipynb

day1_introduction/2_tour_ui/data/1_world-cities.csv

day1_introduction/2_tour_ui/data/2_world-cities.json

day1_introduction/2_tour_ui/data/3_bar.vl.json

day1_introduction/2_tour_ui/data/5_latex.tex

day1_introduction/2_tour_ui/data/6_barplot.html

day1_introduction/2_tour_ui/data/Museums_in_DC.geojson

day1_introduction/2_tour_ui/data/example_notebook.ipynb

day1_introduction/2_tour_ui/data/mardown_python.md

..._introduction/2_tour_ui/data/zika_assembled_genomes.fasta

day1_introduction/2_tour_ui/images/bokeh-header.png

day1_introduction/2_tour_ui/images/bokeh-transparent.png

day1_introduction/2_tour_ui/images/jupyterhub-logo.png

day1_introduction/2_tour_ui/images/jupyterlab-logo.svg

day1_introduction/3_first_steps/1-JupyterLab-coding.ipynb